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The weekly round-up on the climate crisis and data on carbon dioxide levels in the atmosphere. After more than half a century of research into nuclear fusion, a major breakthrough comes from the United States that could pave the way for enormous amounts of clean energy in the future.Researchers at the US National Ignition Facility, in California, said their fusion experiments released more energy than was pumped out by the lab's huge, high-powered lasers.This is a historic achievement, known as ignition or energy gain.Until now, in fact, experiments conducted around the world had required more energy than they had generated.However, writes the Guardian, this does not mean that we are in an energy utopia.This technology is still far from being ready to be transformed into power plants, it will not have any immediate effects on the climate crisis, but, as mentioned, it is a big step for science and research which demonstrates that fusion is a viable path to meet the planet's gr...